Brush for dynamo-electric machines



(No Model.)

J. w. DICKEY. BRUSH FOR DYNAMO ELECTRIC MACHINES. No. 533,533.

Patented Feb. 5,1895.

m5 NORRIS vzfzns cu, PHoTo-umo, WASHINGTON, u. c.

UNITED STATES PATENT OFFICE.

JOSEPH WVELLS DICKEY, OF NEIV YORK, N. Y., ASSIGNOR OF ONE-HALF TO CHARLES E. CHAPIN, OF SAME PLACE AND MILFORD, CONNECTICUT.

BRUSH FOR DYNAMO-ELECTRIG MACHINES.

SPECIFICATION forming part of Letters Patent No. 533,583, dated February 5, 1895.

Application filed December 8,1894. Serial No. 581,292. (No model.)

To aZZ whom it may concern:- It will of course be understood that in cut- Be itknown that I, JOSEPH VVELLS DICKEY, ting my blanks angularly to the length of the 55 a citizen of the United States of America, rewire cloth or mesh, the wires of the mesh will siding in the city, county, and State of New also run angularly across my blanks. I do York, have invented certain new and useful not claim this as new with me.

Improvements in Brushes for Dynamos; and After the blanks have been wound over the I hereby declare that the following is a full, former, the former is withdrawn and the 60 clear, and exact description and specification folded mesh is pressed into the shape shown of theinvention,referencebeing had to the 210- in Fig. 3 by a powerful press into a suitable IO companying drawings, forming a part of the mold shown and claimed by me in another same. application, Serial N0. 531,291, filed of even Iam aware that dynamo brushes have heredate herewith, December 8, 1894. The ad- 65 tofore been constructed of woven wire mesh, vantages which accrue from this mode of conbut I am not aware that previous to my instruetion are as follows: Then a blank such vention thereof any dynamo brush,containing as A is wound on a former at the beginning my improvements, has ever been constructed. of the operation, the angular part does not My invention relates to dynamo brushes, cover the former evenly, that is to say, the 70 wherein the individual wires of the mesh run thickness of the material at one end is greater angularly to the parallel side of the brush, and is more compact than at the other end, and it consists in certain details of construcand on a long brush this causes an uneven tion fully set forth herein. winding and hollowness. This difficulty I In order that persons skilled in the art to remedy by the arrangement of pieces above 75 which my invention appertains may undershown and described. The shorter piece bestand, construct and use my invention, I will ing placed in reverse position over the longer proceed to describe it, referring to the drawone, it very nearly fills up the vacant space ings herewith, in which left by the angular part of the longer one,

Figure 1 is a plan View of a strip of wire thus makingacompact brush. The final laps So mesh, cut from a roll of mesh, on the bias, or of the wire mesh strip over the inclosed mesh angularly to the longitudinal trend of the present an angular or spiral appearance, and 0 roll, about as shown. It also showsa shorter bind the whole mass together when soldered piece of mesh placed by the side of the longer at the point D, so that the wear of the brush piece, with the angle at its ends lying in releaves no mesh wires parallel with the com- S verse position. The dotted lines in this figmutator to the fly off. ure show the shorter piece, placed over the The operation will be apparent to those 5 longer piece previous to winding the two toskilled in the art, and needs no further degether over a former. Fig. 2 shows the two scription. blanks as they appear at the commencement Having now fully described my invention 90 of the Winding over the former. Fig. 3 shows and the manner in which I have embodied it, the brush when completed, and after being what I claim as new and as my invention ispressed or molded into shapein a suitable die. In a dynamo brush composed of woven wire A is the woven Wire blank out from the roll cloth or mesh, the combination with main of mesh, on the bias, across the width of the blank, cut angularly to the length of the roll 9 5 mesh. or piece of a second shorter piece of wire cloth B is a shorter piece similarly cut from the similarly out and placed over the main blank, 5 strip. with its angular ends in reverse position to C is a former over which the wire blank is those of the main blank, and wound up and wound before pressing it into its final shape pressed to form and forminga dynamo brush [00 for use. of suitable shape, substantially as and for the The point of the angular end D is soldered purposes hereinbefore specified. to the mass of the brush to hold it firmly in JOSEPH WELLS DICKEY.

place, and I usually solder the whole end 6 Witnesses: together and bevel off the end f previous to JAMES M. HICKS,

use on the commutator of a dynamo. CHARLES IV. LOW. 

